Stand for manufacturing bicycles

ABSTRACT

The invention concerns a stand for manufacturing bicycle, of the type comprising in particular: a frame ( 1 ), handlebars ( 3 ), a fork ( 2 ), a handlebar extension ( 4 ), for fixing the handlebars ( 3 ) on the fork ( 2 ), mounted mobile on the frame ( 1 ), a crankset ( 7 ) provided with a shaft, a saddle ( 5 ), a seat tube ( 6 ) for mounting the saddle ( 5 ) on said frame ( 1 ). The invention is characterised in that the bench comprises a table ( 10 ) bearing first ( 16 ) and second ( 18 ) means for fixing the bicycle and a measuring device ( 20 ) for determining at least one characteristic dimension of the bicycle.

FIELD OF THE INVENTION

[0001] The present invention relates to a stand for manufacturingbicycles of the type comprising in particular:

[0002] a frame

[0003] a handlebar

[0004] a fork

[0005] a handlebar stem for fixing the handlebar to the fork andmounting it mobile on the frame,

[0006] a crankset mounted mobile on the frame,

[0007] a saddle, and

[0008] a seat post for fixing the saddle on the frame.

BACKGROUND OF THE INVENTION

[0009] A bicycle has to be dimensioned such that it fits the morphologyof its user. In most cases, the salesperson uses his know-how withoutrelying on any particular technical means. He simply checks that hisclient has a satisfactory position on the bicycle.

[0010] Bicycles made for frequent use are manufactured from industriallyproduced parts that are assembled in a craftsman-like manner. Themanufacturer measures the user and selects the best suited parts fromamong the existing parts, on the basis of tables. The mobile parts suchas the handlebar and saddle are then fitted to the user.

[0011] Despite these measures, it has become apparent that, when thissport is practised intensively, it is desirable to determine thedimensions of the bicycle even more precisely. These dimensions can bedetermined, by antropometry, for example by means of the apparatusdisclosed in Swiss Patent No. CH 1983/99, entitled “AntropometricMeasuring Device”, and/or by means of a dynamometric bicycle such asthat marketed by Ergomotion, Lugano, Switzerland by the name of“DynaOne”. By this method, it is possible to determine the optimumdimensions of the bicycle. However, it is not easy to guarantee suchdimensions during assembly of series produced constituent parts and evenduring made-to-measure manufacture.

SUMMARY OF THE INVENTION

[0012] Indeed, bicycle adjustment is generally carried out using simpletools such as rulers or bevel protractors. The accuracy thereby obtainedis mediocre. It has become apparent that inadequate adjustment couldlead to health problems for the user, especially when he or shepractices the sport intensively. It is an object of the presentinvention to propose a high performance tool, for checking the rigidparts and positioning the mobile parts constituting a bicycle, such thatit is better fitted to its user.

[0013] The stand therefore includes a table and first and second meansfor securing the bicycle to the table. The table further supports ameasuring device for determining at least one characteristic dimensionof the bicycle. Thus, due to the fact that the measuring device isdirectly carried by the table to which the bicycle is secured, it ispossible to guarantee a high level of accuracy in determining thedimensions of the bicycle.

[0014] Advantageously, the measuring device includes a sliding blockmounted so as to slide on the table and an arm mounted so as to pivot onthe sliding block. It is thus possible to place the device at rightangles to the crankset and arrange the arm so as to be able to measurethe height of the crank axle, the height of the saddle, the angle of theseat tube and the height of the frame. Moreover, since the arm ismounted so as to pivot on the sliding block, it is possible to measurethe inclination of the seat tube.

[0015] In order to facilitate measuring the height of the crank axle,the arm is provided with connecting means for co-operating with thehousing of the crankshaft to secure them to each other. It furtherincludes a rule and a probe or feeler pin for measuring the height ofthe saddle with reference to the crankshaft axle.

[0016] Measurement of the length of the frame and the dimensionsrelating to the handlebar and its handlebar stem, is facilitated by thefact that the stand further includes two posts fixed to the table and acrosspiece mounted so as to slide on the posts.

[0017] Advantageously, each of the posts is provided with a rule formeasuring the position of the crosspiece. Moreover, the crosspiece bearsa rule and a sliding block provided with a fork, for measuring theposition of the handlebar stem and the handlebar.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features and advantages of the invention will appear fromthe following description, made with reference to the annexed drawing,in which:

[0019]FIG. 1 shows, schematically, a bicycle on which the importantdimensions are indicated to ensure that the bicycle conforms to itsuser;

[0020]FIG. 2 is an overall view of a stand according to the invention;and

[0021] FIGS. 3 to 11 show, more precisely, certain parts of the stand ofFIG. 2.

DESCRIPTION OF A PREFERRED EMBODIMENT

[0022]FIG. 1 shows schematically a bicycle including a frame 1 provided,in particular, with a seat tube 1 a and a head tube 1 b, a fork 2engaged in head tube 1 b, a handlebar 3, a handlebar stem 4 bearinghandlebar 3 and engaged in head tube 1 b and secured to fork 2 in amanner known to those skilled in the art, such that the handlebar andthe fork can be rotated together on frame 1, a saddle 5, a seat post 6bearing saddle 5 and engaged in seat tube 1 a to secure saddle rigidly 5to frame 1, and a crankset 7.

[0023] This bicycle is characterized by the following dimensions, shownin FIG. 1:

[0024] height of the crankset axle (HB),

[0025] saddle height (HS),

[0026] seat tube angle (TV),

[0027] seat tube offset (DTV),

[0028] frame height (HC),

[0029] frame length (LC),

[0030] inclination of head tube (TD),

[0031] handlebar stem height (HG),

[0032] handlebar stem length (LP),

[0033] retraction of saddle (RS),

[0034] saddle-handlebar distance (SG).

[0035] The stand illustrated in FIG. 2 essentially includes a table 10,two posts 12 and 14, two supports 16 and 18, a measuring device 20 and acrosspiece 22.

[0036] Table 10 is formed of a square profile member 24 and a rod 26 ofrectangular cross-section, fixed to profile member 24, which togetherdefine a longitudinal axis A-A. It is provided with a chassis 28,partially shown and intended to rest on the ground or on a workbench,and which includes conventional adjusting means, for defining theposition of the stand, particularly its horizontal position. These meanshave not been shown to avoid overloading the drawing and thedescription.

[0037] Posts 12 and 14 each include a base 30, a mast 32 mounted on base30, and a rule 34 fixed to mast 32. These various parts are assembled toeach other and to table 10 by means of screws that have been partiallyshown in the drawing but have not been referenced. The mast of post 12is oriented along a vertical axis B-B, perpendicular to axis A-A. Themast of post 14 is arranged parallel to axis B-B.

[0038] Supports 16 and 18 are both formed of a sliding block 36 and asupporting arm 38.

[0039] As can be seen in FIGS. 3 and 4, sliding block 36 is constructedso as to form a slide 40 to be engaged in rod 26, to allow support 16 or18 to slide on table 10. It is provided with a threaded hole 41 and atightening member 42, engaged in threaded hole 41. A shoe 43, extendingalong the side of slide 40 provided with threaded hole 41, is pressedagainst rod 26 by tightening member 42, to lock base 16 or 18 onto table10. Pins, shown in the drawing, but not referenced, ensure thepositioning of shoe 43 on sliding block 36.

[0040] Support 16, shown in detail in FIG. 3, is for fixing the bicyclevia its front part, as will be explained hereinafter. For this purpose,its supporting arm 38 is provided with four cylindrical holes 44, whoseaxes are parallel to each other and identified by the letters a to d. Ashaft 46, formed of a cylindrical rod, threaded at both of its ends, isengaged in one or other of holes 44. Shaft 46 defines a lateral axisC-C, perpendicular to axes A-A and B-B. It bears two adjustment rings48, arranged on either side of supporting arm 38, and two tighteningmembers 50, each screwed onto one of the threaded ends of shaft 46. Itshould be noted that, in FIG. 2, shaft 46 with rings 48 and tighteningmembers 50 have been arranged above support 16, so as to allow itsstructure to be seen more clearly.

[0041] Support 18 is shown in more detail in FIG. 4. It is for fixingthe bicycle via its back end, as will be explained hereinafter. Itssupporting arm 38 bears a selector 52, of parallelepiped shape, providedon four of its sides with a fixing pin 54, these pins being in coaxialpairs, the pairs being perpendicular to each other. Pins 54 have a body54 a and a finger-piece 54 b whose end is threaded. Tightening members55 can be screwed thereon.

[0042] Body 54 a is connected to finger-piece 54 b by a shoulder 54 c.The two pairs of pins 54 have different distances between their twoshoulders 54 c, the pins used being selected as a function of thefeatures of the frame.

[0043] Supporting arm 38 is provided with a hole 56 oriented along aparallel axis to axis A-A. Selector 52 is pierced with a threaded hole58 and two positioning holes 59. A tightening member 60, for securingthe supporting arm to the selector, is engaged in hole 56 and screwedinto hole 58. A stud 61, engaged in an unreferenced hole of supportingarm 38, co-operates with one or other of holes 59 to position selector52 on support 18.

[0044] As can be seen in FIG. 2, measuring device 20 includes a slidingblock 62 and an arm 64.

[0045] Sliding block 62 forms a slide 65 arranged so as to be engaged onrod 26 and a projecting part 66 whose face 66 a is pierced with athreaded hole, oriented parallel to axis C-C and into which a thumbscrew tightening device 68 is screwed. Face 66 a is plane and acts as asupport for arm 64, as explained hereinafter.

[0046] Arm 64, shown in detail in FIG. 5, includes a lever 70, acrankset plate 72 and a bar 74, assembled to each other by means of twothumb screw tightening devices 76.

[0047] The function of lever 70 is to ensure the pivoting assembly ofarm 64 on sliding block 66. It is formed of a bar of rectangularcross-section, including two recesses 70 and 70 b, which extend alongthe same line as each other. Recess 70 a, which is the shorter, is forensuring the connection of arm 64 to sliding block 62 by engaging thumbscrew tightening device 68.

[0048] Crankset plate 72 is of generally parallelepiped shape, with alarge face 72 a adjacent to bar 74 and in which a groove is made, notvisible in the drawing, in which bar 74 is engaged and positioned, and alateral face 72 c provided with a finger-piece 72 d.

[0049] Finger-piece 72 d includes a first cylindrical hole 72e, orientedparallel to axis C-C and intended to receive a stud 78 whose functionwill be specified hereinafter. It is provided with a slit extending overthe entire length of hole 72 e, and a second hole, perpendicular to theslit and divided by the latter into two portions, one of which isthreaded. This second hole acts as a housing for a tightening member 80.

[0050] Plate 72 is also pierced with two pairs of threaded holes, one ofwhich is for receiving the screws of thumb screw tightening devices 76.The function of the holes of the second pair will be specifiedhereinafter.

[0051] Bar 74 is of generally parallelepiped shape, one face 74 a ofwhich is provided with a groove 74 b extending over ¾ of its length asfar as its free end and in which a rule 82 is housed. It includes, atits other end, a pair of holes 74 c in which screws 84 are engaged,these screws being tightened in the holes of the second pair of cranksetplate 72, to ensure that it is rigidly fixed onto bar 74. One of thelongitudinal edges adjacent to groove 74 b has a bezel 74 d whosefunction will be specified hereinafter.

[0052] Measuring device 20 further includes three runners 86, 88 and 90visible in FIG. 2. Runners 86 and 88 respectively bear probes 92, 94,whereas runner 90 acts as a support for two probes bearing thereferences 95 and 96, for measuring certain dimensions of the bicycle,as will be explained hereinafter. Only runner 90 is described in detailhereinafter, with reference to FIG. 6. The two others will be describedwith reference to FIG. 11.

[0053] As FIG. 6 shows, runner 90 is formed of a body 90 a, of generallyparallelepiped shape, provided, on one of its large faces, with a groove90 b and with a projecting portion 90 c on the other large face.

[0054] Groove 90 b is closed by means of a plate 98, fixed to the bodyby means of screws 100, to form a slide 90 d for receiving bar 74.Runner 90 is also provided, on one of the walls of groove 90 b, with ashoe 102, with pins 104 secured to the shoe and a thumb screw tighteningdevice 106, engaged in body 90 a of the runner, to form together and ina conventional manner, a system for locking runner 90 onto bar 74.Projecting portion 90 c is provided with a hole 90e in which probe 96 isengaged. An elastic member, arranged in hole 90 e and not visible in thedrawing, ensures the positioning of probe 96. It would also be possibleto fix it by means of a tightening member or a thumb screw tighteningdevice.

[0055] Probe 96 is formed of a cylindrical tube, one end 96 a of whichis conical. It is provided with a flat portion 96 b on which a ruler 108is placed, for example by bonding.

[0056] With reference to FIG. 2, it is clear that cross-piece 22 isessentially formed of a bar 110 of substantially rectangularcross-section and two connecting studs 112 and 114, for fixingcross-piece 22 in a removable manner, onto posts 12 and 14.

[0057] As is visible in FIG. 7, bar 110 includes two recesses 110 a and110 b, arranged longitudinally at each of its ends and open over itslarge faces, respectively facing posts 12 and 14. It bears a rail 115,fixed to one of its large faces, in the extension of recess 110 a bymeans of screws 116. Rail 115 carries two runners 117 and 118 (FIG. 2).The rail and the runners are made by means of an assembly sold byHoerbiger (Switzerland) under the reference RK-FD 15S.

[0058] A rule 120 is mounted on bar 110, on its top lateral face,arranged such that it extends forwards short of the handlebar andbackwards beyond the seat tube and is fixed by means of screws 121.

[0059] Connecting studs 112 and 114 (FIG. 2) both include a body 122pierced with a cylindrical hole 122 a in which mast 32 is engaged. Amobile part 124, fixed to body 122 by means of a tightening member 126,locks studs 112 and 114 onto masts 32 in a conventional manner, in orderto secure them to each other. Bodies 122 are provided with a threadedhole whose axis is parallel to axis C-C and made in the end opposite tothe side provided with hole 122 a, arranged such that it is locatedfacing recesses 110 a or 110 b for receiving a tightening member 128.

[0060] Tightening members 128 of studs 112 and 114 are respectivelyengaged in recesses 110 a and 110 b and secure bar 110 to studs 112 and114 in a removable manner.

[0061] Runners 117 and 118 respectively bear measuring tools 130 and 132shown in FIG. 8.

[0062] Measuring tool 130 includes a support 134 rigidly fixed ontorunner 117, by means of screws 136, a bar 138, a runner 140 and a probe142. Bar 138 has a comparable structure to bar 74, but its length issmaller. It is fixed to support 134 by means of a thumb screw tighteningdevice 143 in a similar way to the manner in which lever 70 is securedto sliding block 60. Runner 140 is mounted on bar 138 in the same waythat runner 96 is mounted on bar 74. This is why these different partswill not be described in more detail here.

[0063] Probe 142, illustrated in FIG. 9, is integral with the body ofrunner 140. It has the shape of a prism, one edge 142 of which isoriented upwards.

[0064] Measuring tool 132 visible in FIG. 8, is formed of a setsquare-shaped support 144 with two arms 144 a and 144 b, a mast 145 anda fork 146. Arm 144 a is rigidly fixed to runner 118 by means of screws147. Arm 144 b extends above crosspiece 22 and carries cylindrical mast145 at its end, secured, for example by being driven into support 144.

[0065] Fork 146 is shown in perspective in FIG. 10, assembled at a andexploded at b. It includes an arm 148, a hand 150, an offset member 152and a rule 154. Arm 148 is formed of a slit sleeve 148 a and a stem 148b.

[0066] Sleeve 148 a includes a central aperture 148 c, for receivingmast 145 and a slit 148 d, opening into aperture 148 c and forming twolips 148 e. A hole 148 f perpendicular to slit 148 d passes through thetwo lips 148 e and forms two portions, one of which is threaded. Atightening member, which is not visible in the drawing, is engaged inthe non-threaded portion and screwed into the threaded portion of hole148 f, in order to tighten arm 148 onto mast 145.

[0067] Hand 150 includes a wrist-piece 150 a and two horizontalfinger-pieces 150 b and 150 c arranged parallel to each other and in theextension of wrist-piece 150 a. The distance between finger-pieces 150 band 150 c is equal to the diameter of the tube forming handlebar 3. Thetop face of bottom finger-piece 150 c is located in the extension of thebottom face of stem 148 b.

[0068] Offset member 152 is of parallelepiped shape, inserted betweenthe free end of stem 148 b and wrist-piece 150 a, which are alignedalong a direction parallel to axis C-C. Stem 148 b, wrist-piece 150 aand offset member 152 are all pierced with holes in which screws 156 areengaged in order to assemble fork 146.

[0069] Stem 148 b bears, on its top face, rule 154, which isadvantageously fixed by bonding.

[0070]FIG. 11 shows measuring device 20, its runners 86, 88 and 90 andits probes 92, 94, 95 and 96 in more detail.

[0071] Probe 92, integral with runner 86, is comparable to probe 142described with reference to FIG. 9, the edge being however orienteddownwards.

[0072] As explained hereinbefore, runner 88 bears two probes 94 and 95.Probe 94 is a stem comparable to that forming probe 96. It is, however,arranged on runner 88 such that it is oriented parallel to axis C-C.

[0073] Probe 95 includes a tube 158 oriented parallel to axis A-A andfixed to runner 88 by means of a tightening member that is not visiblein the drawing. Tube 158 bears a graduation which has not been shown inthe drawing and which allows certain dimensions to be measured, as willbe explained hereinafter. A fork 160, formed of an arm 160 a engaged intube 158 and a U-shaped part 160 b, each of the ends of the U beingprovided with two finger-pieces 160 c, arranged such that finger-pieces160 c can be engaged against the head tube, on either side of thehandlebar stem. Arm 160 a is provided with a flat portion orientedupwards, on which a ruler 162 is fixed.

[0074] In order properly to use a stand like the one that has just beendescribed, one also needs to have an electronic spirit level, of thetype allowing angles to be determined as a function of the horizontal.This spirit level can be of any type available on the market.

[0075] The first operation consists in adjusting table 10. For thispurpose, the spirit level is placed on rod 26 and chassis 28 is levelledsuch that the table is perfectly horizontal. In this position posts 12and 14 are, by construction, vertical.

[0076] Supports 16 and 18 are arranged such that, when shaft 46 ofsupport 16 is engaged in hole 44 a, it is at the same distance fromtable 10 as pins 54 of support 18. In other words, a plane passingthrough the axes of shaft 46, engaged in hole 44 a, and pins 54 ishorizontal, since it is parallel to the surface of rod 26.

[0077] The bicycle can then be placed on the stand, as shown in FIG. 2.More precisely, tightening members 42 are loosened, such that supports16 and 18 can be moved on table 10. Fork 2 is mounted on support 16 byits ends, which are arranged for receiving the hub of the front wheel,shaft 46 playing the role of the latter. Likewise, the frame is adjustedon support 18 by its members for receiving the hub of the back wheel. Itis fixed onto pins 54, the position of selector 52 being selected suchthat shoulders 54 c allow frame 1 to be positioned on its support.

[0078] If the front wheel of the bicycle is of the same diameter as theback wheel, shaft 46 is engaged in hole 44 a. Consequently, the bicycleis in a position corresponding to that which it would have on a flathorizontal road.

[0079] If the front wheel was of smaller diameter than the back wheel,this difference would be compensated for by choosing one of holes 44 bto 44 d, such that the bicycle is also in a position corresponding tothat which it would have on a flat horizontal road.

[0080] Measuring device 20 is then fitted to the bicycle. Thumb screwtightening device 68 is thus loosened, so that sliding block 62 canslide on table 10. Arm 64 is then adjusted such that hole 72 e isopposite the support of crankset 1 c. Stud 78 can then be engaged inhole 72 e and in crankset support 1 c, tightening member 80 then beingtightened, such that stud 78 is rigidly fixed to the crankset plate.Stud 78 is dimensioned such that it can pivot freely in crankset support1 c with minimal play.

[0081] The spirit level is then applied against arm 64, in order toplace the latter vertically. When this adjustment has been made, thumbscrew tightening devices 68 and 76 are tightened.

[0082] Studs 122 are then adjusted such that they are at the samearbitrary height, for example 300 mm, measured on rules 34, then fixedby tightening members 126. Bar 110 is then set in place on studs 122, bymeans of tightening members 128. It is parallel to table 10 if the twoheights of studs 122 are equal. This means that bar 110 is horizontal.The height of the crank axle HB can then be determined by subtracting,from the height of studs 122, read on rule 34, the value read on rule82, where it intersects bar 110.

[0083] The next operation consists in checking the inclination TV ofseat tube 1 a and the height of saddle 5. The latter is engaged in seattube 1 a, tightened such that it can be moved with no effort.

[0084] The measuring device is inclined such that it is orientedparallel to seat tube 1 a. Runner 88 is moved on bar 74, until probe 94is at theoretical saddle height HS. This reading is made on rule 82.More precisely, the value read is equal to the saddle height HS less thelength of the cranks of crankset 7 which is also measured. Saddle 5 isthen brought into contact with probe 94.

[0085] The inclination of seat tube TV can be checked either by usingthe spirit level, or by trigonometry.

[0086] If the measured value is different from the theoretical value,the measuring device is brought into the theoretical position, and thesaddle is moved forwards or backwards, depending on the correction made.Consequently, although the frame does not correspond perfectly to thetheoretical inclination, moving saddle 5 in a parallel direction to axisA-A allows this fault to be corrected. The correction must not, however,exceed certain limits, depending on the weight of the user, because ofthe torque that the saddle undergoes, the user's weight no longer beingdirectly applied to the seat post. If necessary, saddle height HS can beadjusted again.

[0087] The handlebar position and particularly the handlebar stem heightHG is adjusted by placing crosspiece 22 such that it corresponds to thetheoretical height HC of the frame. Measuring device 20 is thus held inits position forming an angle TV with the horizontal and runner 88 ismoved on bar 74 until the dimension corresponding to HC is reached.Cross-piece 22 is then moved upwards on masts 32, such that it restsagainst probe 94. It is thus at the desired height. Crosspiece 22 isthen adjusted along a parallel direction to axis A-A, such that thebeginning of rule 120 is opposite the conical end of probe 94.

[0088] The following part of the description refers to FIG. 8. Measuringtool 130 is then adjusted such that bar 138 forms, with the horizontal,an angle equal to head tube angle TD. It is placed on bar 110 at thedimension equal to frame length LC. Runner 140 is moved on bar 138 to aheight corresponding to height HG of handlebar stem 4. Fork 146 is thenbrought to rest on edge 142 a of probe 142. Consequently, the top faceof bottom finger-piece 150 c is at the desired height. Runners 117 and118 and measuring tools 130 and 132 are locked. By loosening tighteningmembers 128, it is possible to move bar 110 along axis A-A, whilesliding handlebar stem 4 in tube 1 b, until handlebar 3 can be insertedbetween finger-pieces 150 b and 150 c, as shown in FIG. 8. Handlebar 3is then at the right height. The point of intersection of bar 138 witharm 148 allows the handlebar stem length LP to be read on rule 154.Reading is facilitated by the fact that edge 142 a of probe 142 isopposite rule 154.

[0089] The next operations, explained with reference to FIG. 11, allowthe saddle retraction RS and the saddle-handlebar distance SG to bedetermined. In order to do this, measuring device 20 is again placedvertically, adjustment being carried out by means of the spirit level.Runner 88 is brought to the height of saddle 5, then tube 158 isinserted therein, such that by sliding, it comes to rest via its endagainst the point of saddle 5. The tube is then locked by means of thetightening member that is not visible in the drawing. The graduationborne by tube 158 then allows the saddle retraction value RS to be read.

[0090] Fork 160 is then introduced into tube 158 and the runner adjustedin height on bar 74 such that finger-pieces 160 c are engaged on eitherside of the horizontal tube of handlebar 3 and U-shaped part 160 b arestopped against the tube. It is then possible to read thesaddle-handlebar distance SG on ruler 162.

[0091] It is clear from the foregoing description that the stand thathas just been described allows, via its principles, virtually all theparameters of the bicycle being assembled and/or checked to be adjusted.It is evident that measurement of the various parameters of the bicyclecan be envisaged on the basis of other similar structures, withoutthereby departing from the scope of the invention.

[0092] It is thus possible to replace the rules with optical readers andto carry out all of the measurements by electronic means.

[0093] It is also possible to integrate bevel protractors or spiritlevels for example in table 10, cross-piece 22 or measuring device 20,such that it is not necessary to rely on a tool independent from thestand.

[0094] It is also possible to optimise an existing bicycle so that it isas well fitted as possible to the user, without however making anysignificant modifications to the bicycle, for example by adapting saddle5 or by changing handlebar stem 4.

What is claimed is:
 1. A stand for manufacturing bicycles of the typecomprising in particular: a frame, a handlebar, a fork, a handlebar stemfor fixing the handlebar to the fork and mounting it mobile on theframe, a crankset provided with a shaft, a saddle, and a seat post formounting the saddle on said frame, wherein said stand includes a tablebearing first and second means for securing the bicycle and a measuringdevice for determining at least one characteristic dimension of saidbicycle.
 2. A stand according to claim 1, wherein said device includes asliding block mounted so as to slide on said table and an arm mounted soas to pivot on said sliding block.
 3. A stand according to claim 2,wherein said arm is provided with connecting means for co-operating withthe recess of said crankshaft.
 4. A stand according to any of claims 1to 3, wherein said arm is provided with a rule and a probe for measuringthe position of the saddle with reference to the axle of said shaft. 5.A stand according to any of claims 1 to 4, further including two postssecured to said table and a crosspiece mounted so as to slide on saidposts.
 6. A stand according to claim 5, wherein said posts are eachprovided with a rule (34) for measuring the height position of saidcross-piece.
 7. A stand according to claims 5 and 6, wherein saidcrosspiece carries a rule and a runner provided with a fork formeasuring the position of the stem and the handlebar.